Keystones — Lintel
Five GCSE retrieval questions · 16 October 2010 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00093 in standard form
Answer: 9.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 15x + 50
Answer: (x - 5)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.7cm -
4. Ratio Mixed ratio problems
£174.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £116.00 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 48, 26, 31, 44, 33, what is the missing number?
Answer: 16